Paramedics Rallied to Save Corey Haim

3/10/2010 2:28 PM PST BY TMZ STAFF

A witness at the apartment complex where Corey Haim collapsed tells TMZ, paramedics -- who arrived shortly after 1:00 AM -- spent 20 minutes inside the apartment before carrying him out on a stretcher with an oxygen mask over his face .... suggesting Corey was still alive when he went to the hospital.